Loading boom



Feb. v'19, 1929.

A. B. ESSELTINE LOADING BOOM 2 `Smeets-Sheet` l Filed March 4; 1926 51. P al@ A. B. ESSELTlN-E Feb, 19, 1929.

LOADING ooM Filed uarh 4. 1926 2 sheets-sheet 2 Aw J HHHHIIHIV IMU nllvllllhnlhl Patented Feb. 19,v 1929.

UNITED STATES PATENT OFFICE.

ALFRED B. ESSELTINE, OF CHICAGO, ILLINOIS, ASSIGNOR TO GOODMAN MANUFACTUR- ING- COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

LOADING BOOM.

Application led March 4, 1926.

This invention relates to improvements in apparatus for handling loose material and has among other objects to provide a new and improvedploading boom for a device of this class, such as described in the application of Charles E. Davis bearing Serial Number 352,413, filed January 19, 1920.

My invention may be best understood by reference to the accompanying drawings wherein: l

Figure 1 is a plan View of the device elnbodying my invention;

Figure 2 is anfenlarged fragn'ientary View of Figure 1; f

Figure 3 is a side elevation of the view l shown in Figure 2;

2. This device is preferably used to gather, coal in mines and is fully described y1n ythey application of Charles E. Davis, Serial Number 352,413, filed January 19, 1920, previously referred to herein. It is therefore unnecessary to give details of the power device herein, excepting such as are essential to the present invention.

rIhe power device above referredto is portable and can be moved with its scraper and guiding means to different sections of the mine. A loading boom 3 extends to the rear of the inclined guide 1 and is adapted to slide longitudinally thereon, as will now be described in detail. Y

The loading boom 3 (Figures 1, 2 and3) comprises two side members 5, 5 connected at their rear end by a cross member 6. These side members lit and are capable of being moved longitudinally in guides 4, 4 (Figure 5) on each side of the incline 1. A sheave Serial No. 92,153.

7 is mounted to the rear of the cross member 6, preferably at the longitudinal center thereof. The boom is particularly designed for cooperation with a head rope 8,y which is shown herein as passing from the top of a head rope drum 9 backwards to the sheave 7, over said sheave and forward to the scraper 2.

Means are preferablyprovided for positively moving the loading boom 3 longitudinally in the guides 4, 4. In the construction shown, I provide a rack and pinion for thisy purpose. The side members 5, 5 of the boom 3 are preferably made up of channel irons havmg flanges extending outwardly. (Figures 1 and 5). A rack 16 is mounted to the upper surface of the lower liange of each longitudinal channel member 5. A pinion 17 meshes with the rack 16 and is keyed to a shaft 18 which is carried in a bracket 19 adjacent the rear of the incline 1. A crank 20 is removably attached to the shaft 18. Rotation of the cranks 20, 20 on each side of the incline 1 rotate the pinions 17, 17 which move the racks Y 16, 16 and thus move the loading boom 3' longitudinally in its guides.

A-movable locking piece 24 is pivoted at 25 and engages a holding piece 26 which lits into a recess 27 in the locking piece 24. IVhen the parts are in theiroperative position the locking piece is in the position shown in Figure 3. When it is desired to move the boom in out of the way it is first moved outwardly to release the shoulder 27 from the holding piece 26.v The locking piece 24 may then be moved about its pivot to a position where it will not strike thel holding piece and then thefboom may be moved to its inoperative position by turning the cranks 20. i

A stop 10 is placed on each yside of the rear crossmember 6 to stopy the scraper 2. Said stops comprise a rod 28 which projects forwardly of the cross member 6 and is capable of sliding longitudinallyl in guide holes 29 and 30. A forward end 34 of the rod 28 is bent at right angles and extends in toward the center of the boom to catch and rvstop the scraper `when it reachesthe end of its forward movement. Acollar;35 is fastened to the forward end of therod28. A spring 36 .is interposed between ythis collar and the guide CFI 30. 'lhe guide 30 is pivotally mounted to a bracket 37 by a pivot pin l5. 'lo fold the stops 10 in out of the way, the rod 28 is pulled forward until it disengages the guide 29. rlChe stop can then be pivoted in toward the center of the loading` boom.

The arrangement of these spring stops so spring bumpers l0, l0 on each side oil the rear cross member 6. 'lbe scraper 2 is preferably of the V type having an open bottom so as to allow its load to drop through an opening ll into a suitable receiving;` device (not shown) when drawn over that opening.

It will here be seen that the opening lll has -no obstruction to hinder the coal from being freely discharged from 'the scraper 2. Other constructions of loading` booms performing the same duty, and more particularly the construction used in Davis application, Serial Number 352,413, comprise an extension arm which extends longitudinally backwards from the center of the inclined guide chute and carries a slieave at its rearward end'. This central extension arm hinders the discharge of the load from the scraper since the loaded scraper must straddle this arm. This causes the load to be split as it drops to the receiving device below. lt also makes it difficult to load lump coal as the lumps are either broken by their impact with the arm when drawn up on the arm or when caught between the scoop and arm when the scoop is initially drawn baclr to its loading position, The construction herein set forth eliminates t rese disadvantages and makes it possible to efficiently load a receiving device such as a mine car without breaking or splitting the lump coal. Since my invention is preferably used on a portable loading machine which often moved about in a mine where the head room is restricted, it is necessary that Iit take up little space as possible while the loading machinc is being transported from placf.` to place. This is accomplished by slidingthe boom if) forward in .the guides ll. The 5,, bumper l0, l0 pivots on the pins i5 and ,if-olds in out of the way to allow a maximum forward n'iovement of the boom 3 in the guides 4.

Although l have shown and described one form in which my invention may be ein bodied, it will be understood that the construction and' arrangementof the diii'erent parts may vary widely without departing from the spirit andv scope thereof. Furthermore, I do not wish to be understood as limiting myself to the specific construction illustrated herein, excepting as it may be limited in the appended claims. 4

I claim as my invention:

l. The combination with a scraper loading apparatus of an inclined guide, a loading boom sliding longitudinally in guides in the outermost extremities of said incline, and resilient stops for said scraper comprising elongated compression members pivotally mounted to extend longitudinally of said guide when in operative position but adapted to be swung into transverse position. when the boom is telescoped.

2. rlhe combination with a scraper loading apparatus of an inclined guido, a loading boom sliding longitudinally in guides in the outermost extremities of said incline, and resilient stops for said scraper comprising` spring members on pivotally mounted rods adapted to extend longitudinally of said guide when in operative position but adapted to be s vung into transverse position when the boom is telescoped.

3. The combination with a scraper loading apparatus of an inclined guide, a loading boom sliding longitudinally in guides in the outermost extremities of said incline, and resilient stops'for said scraper comprisingl compression spring members mounted on rods slideable in pivotally mounted brackets, one end of said rods being adaptel to engage the forward end of a scraper andthe rearward portion of the scraper engaging end of said rod engaging said compression spring, the other end of said spring engaging said bracket. Y

4t. The combination with a scraper loading apparatus of an inclined guide, a loading boom sliding longitudinally in guides in the outermost extremities of said incline, resilient stops for said scraper comprising compression spring members mounted on rods sli doable in pivotally mounted brackets, one end of said rods being adapted to engage the forward end of a scraper and the rearward portion ofthe scraper engaging end of said lrod engaging said compression spring, the other end of said (raging said bracket, and means for said stops ina position longitudinah ly of said boom when in operative position or allow said stoilis to swing in a trausv tion when sa id boom is telescopcd.

The combiiuitioi'i with a scraper l apparatus, o" in inclinedrguidc, a. boom exten/.l iin..

1eescopic connection with the sida A said incline compritv a rectangular' frame having a sheave trie c trai 'rear vrrd portion thereof and resilier- .tops projecting forwardly from each rearward inner corner e posi thereof.

G. The combination'with a scraper loading apparatus, of an inclined guide, a loading boom extending to the rear of said incline Aand having telescopic connection with the sides of said incline Comprising a rectangular frame having a sheave in the central rearward por- 5 tion thereofand resilient stops at each rear- Ward inner corner thereof pivotallly moulded to extend longitudinally of said guide when in operative position, but adapted to be swung inwardly as said boom is telescoped into said incline. 10

Signed at Chicago, in the county 'of Cook and State of Illinois, this 1st day of March, A. D. 1926.

ALFRED B. ESSELTINE. 

